EP2265613A1 - Quinazoline linked pyrrolo[2,1-c][1, 4]benzodiazepine hybrids as potential anticancer agents and process for the preparation thereof - Google Patents
Quinazoline linked pyrrolo[2,1-c][1, 4]benzodiazepine hybrids as potential anticancer agents and process for the preparation thereofInfo
- Publication number
- EP2265613A1 EP2265613A1 EP08873110A EP08873110A EP2265613A1 EP 2265613 A1 EP2265613 A1 EP 2265613A1 EP 08873110 A EP08873110 A EP 08873110A EP 08873110 A EP08873110 A EP 08873110A EP 2265613 A1 EP2265613 A1 EP 2265613A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pyrrolo
- methoxy
- oxy
- piperazinoquinazoline
- benzodiazepin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
- C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
- C07D487/04—Ortho-condensed systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
Definitions
- the present invention relates to quinazoline linked pyrrolo[2,1-c][1,4] benzodiazepine hybrids and a process for the preparation thereof. More particularly it relates to 7-methoxy-8- ⁇ substituted(4-piperazinoquinazoline)alkyl]oxy ⁇ -(11aS)- 1 ,2,3, 11a-tetrahydro-5H-pyrrolo[2,1-c][1 ,4]benzodiazepine-5-one with aliphatic chain length variations useful as anticancer agent.
- the structural formula of these quinazoline linked pyrrolo[2,1-c][1 , ⁇ benzodiazepines hybrids is given below.
- Pyrrolo[2,1-c][1 , ⁇ benzodiazepine antitumour antibiotics are commonly known as anthramycin class of compounds.
- PBDs pyrrolo[2,1-c][1 ⁇ benzodiazepines
- antibiotics react covalently with DNA to form an N2-guanine adduct that lies within the minor groove of duplex DNA via an acid-labile aminal bond to the electrophilic imine at the N10-C11 position
- PBD dimers have been developed that comprise of two C2-exo- methylene substituted DC-81 subunits tethered through their C-8 position via an inert propanedioxy linker (Gregson, S. J.; Howard, P. W.; Hartely, J. A.; Brooks, N. A.; Adams, L. J.; Jenkins, T. C; Kelland, L. R. and Thurston, D. E. J. Med. Chem. 2001, 44, 737).
- a non-cross-linking mixed imine-amide PBD dimers have been synthesized that have significant DNA binding ability and potent antitumour activity (Kamal, A.; Ramesh, G.
- Naturally occurring pyrrolo[2,1-c][1 , ⁇ benzodiazepines belong to a group of antitumour antibiotics derived from Streptomyces species. Recently, there is much impetus for the PBD systems as they can recognize and bind to specific sequence of DNA. Examples of naturally occurring PBDs include anthramycin, DC-81 , tomaymycin, sibiromycin and neothramycin.
- the main objective of the present invention is to provide novel quinazoline linked pyrrolo[2,1-c][1 , ⁇ benzodiazepine hybrids, useful as antitumour agents.
- Yet another object of this invention is to provide a process for the preparation of novel quinazoline linked pyrrolo[2,1-c][1 , ⁇ benzodiazepine hybrids.
- the present invention provides a novel quinazoline linked pyrrolo-[2,1-c][1, ⁇ benzodiazepine hybrid of general formula 5
- novel quinazoline linked pyrrolo[2,1-c][1 ,4] benzodiazepine hybrid exhibits an in vitro anticancer/antitumour activity against human cancer cell lines selected from the group consisting of lung (Hop-62), cervix (SiHa), breast (MCF7, Zr-75-1), colon (Colo205), prostate (DU 145, PC3) and oral (DWD, HT1080) cell lines.
- the concentration of quinazoline linked pyrrolo[2,1-c][1 ,4]benzodiazepine hybrid used for in vitro activity against Colo205 for IC50 is in the range of 12 to 80 ⁇ m, at an exposure period of at least 48 hrs.
- the concentration of quinazoline linked pyrrolo[2,1-c] [1 ,4]benzodiazepine hybrids used for in vitro activity against DU 145 for IC50 is in the range of 15 to 80 ⁇ m, at an exposure period of at least 48 hrs. In yet another embodiment the concentration of quinazoline linked pyrrolo[2,1-c] [1 , ⁇ benzodiazepine hybrids used for in vitro activity against DWD for IC50 is in the range of 6 to 80 ⁇ m, at an exposure period of at least 48 hrs.
- the concentration of quinazoline linked pyrrolo[2,1-c] [1 , ⁇ benzodiazepine hybrids used for in vitro activity against HoP62 for IC50 is in the range of 13 to 40 ⁇ m, at an exposure period of at least 48 hrs.
- the concentration of quinazoline linked pyrrolo[2,1-c] [1 ,4]benzodiazepine hybrids used for in vitro activity against HT1080 for IC50 is in the range of 6 to 30 ⁇ m, at an exposure period of at least 48 hrs.
- the concentration of quinazoline linked pyrrolo[2,1-c] [1 ,4]benzodiazepine hybrids used for in vitro activity against MCF7 for IC50 is in the range of 23 to 80 ⁇ m, at an exposure period of at least 48 hrs.
- the concentration of quinazoline linked pyrrolo[2,1-c] [1 ,4]benzodiazepine hybrids used for in vitro activity against PC3 for IC50 is in the range of 5 to about 80 ⁇ m, at an exposure period of at least 48 hrs.
- the concentration of quinazoline linked pyrrolo[2,1-c] [1 ,4]benzodiazepine hybrids used for in vitro activity against SiHa for IC50 is in the range of 19 to about 80 ⁇ m, at an exposure period of at least 48 hrs.
- the concentration of quinazoline linked pyrrolo[2,1-c] [1 ,4]benzodiazepine hybrids used for in vitro activity against Zr-75-1 for IC50 is in the range of 16 to about 80 ⁇ m, at an exposure period of at least 48 hrs.
- the present invention further provides a pharmaceutical composition
- a pharmaceutical composition comprising quinazoline linked pyrrolo[2,1-c][1 ,4]benzodiazepine hybrid, its derivatives, analogues, salts or mixture thereof optionally with pharmaceutically acceptable carriers, adjuvants and additives.
- quinazoline linked pyrrolo[2,1-c][1 ,4] benzodiazepine hybrid used is represented by a general formula 5,
- R 1 , and R 2 is selected from the group of consisting of H, H or CH 3 O, CH 3 O or CH 3 O, C 2 H 5 O, in the presence of a mild inorganic base, in an aprotic organic solvent, under refluxing temperature to obtain the resultant nitro compound of formula 3,
- the mild inorganic base used in steps (a) is selected from the group of potassium carbonate and Acetone.
- the mild inorganic base used in steps (a) is potassium carbonate.
- aprotic organic solvent used in step (a) is acetone and acetonitrile
- organic solvent used in step (c) is acetonitrile and acetone
- the alcohol used in step (b) is selected from methanol and ethanol.
- the compounds of formula 5 obtained are represented by a group of the following compounds: 7-Methoxy-8- ⁇ [-3-(4-piperazinoquinazoline]propyl ⁇ -oxy-(11 aS)-1 ,2,3,11 a-5H- pyrrolo[2,1-][1 ,4]benzodiazepin-5-one (5a);
- the quinazoline linked pyrrOlo[2,1-c][1 ⁇ benzodiazepine hybrid of formula 5a-o exhibits an in vitro anticancer/antitumour activity against human cancer cell lines selected from the group consisting of lung, cervix, breast, colon, prostate and oral cell lines.
- the present invention provides a process for preparation of pyrrolo[2,1-c][1 ,4]benzodiazepine hybrids of formula 5
- the compound 3b has been prepared according to the method described for the compound 3a by employing the compounds 1b (535 mg, 1 0 mmol) was added anhydrous K 2 CO 3 (690 mg, 5.0 mmol) and 4-piperazino-quinazoline (2a) (214 mg, 1.0 mmol) to afford the compound 3b (608 mg, 90%).
- the compound 4b has been prepared according to the method described for the compound 4a by employing compound 3b (669 mg, 1 0 mmol) to afford compound 4b (640 mg, 95%), which, due to potential stability problems, was used directly in the next step.
- the compound 5b was prepared according to the method described for the compound 5a employing the compound 4b (640 mg, 1 0 mmol) to afford the compound 5b (435 mg, 67%).
- the compound 4c has been prepared according to the method described for the compound 4a by employing compound 3c (683 mg, 1 0 mmol) to afford compound 4c (654 mg, 95%), which, due to potential stability problems, was used directly in the next step.
- the compound 5c was prepared according to the method described for the compound 5a employing the compound 4c (655 mg, 1 0 mmol) to afford the compound 5c (450 mg, 68%).
- the compound 3d has been prepared according to the method described for the compound 3a by employing the compounds 1d (563mg, 1 0 mmol) was added anhydrous K2CO 3 (690 mg, 5.0 mmol) and 4-piperazino-quinazoline (2a) (214 mg, 1.0 mmol) to afford the compound 3d (655 mg, 89%).
- the compound 4d has been prepared according to the method described for the compound 4a by employing compound 3d (698 mg, 1 0 mmol) to afford compound 4d (675 mg, 96%), which, due to potential stability problems, was used directly in the next step.
- the compound 5d was prepared according to the method described for the compound 5a employing the compound 4d(668 mg, 1 0 mmol) to afford the compound 5d (465 mg, 69%).
- the compound 3e has been prepared according to the method described for the compound 3a by employing the compounds 1e (563mg, 1 0 mmol) was added anhydrous K 2 CO 3 (712 mg, 5.0 mmol) and 4-piperazino-quinazoline (2a) (214 mg, 1.0 mmol) to afford the compound 3e (675 mg, 90%).
- the compound 4e has been prepared according to the method described for the compound 4a by employing compound 3e (714 mg, 1 0 mmol) to afford compound 4e (682 mg, 95%), which, due to potential stability problems, was used directly in the next step.
- 5a, 5c and 5d was evaluated for in vitro anticancer activity against sixty human tumor cells derived from nine cancer types ⁇ leukemia, non-small-cell lung, colon, CNS, melanoma, ovarian, prostate, and breast cancer) as shown in (Table 1 and 2).
- dose response curves for each cell line were measured at a minimum of five concentrations at 10 fold dilutions.
- a protocol of 48 h continuous drug exposure was used and a sulforhodamine B (SRB) protein assay was used to estimate cell viability or growth.
- SRB sulforhodamine B
- the mean graph midpoint values of log 10 TGI and log-io LC50 as well as logTM GI50 for 5a is listed in Table 1 and 2). As demonstrated by mean graph pattern, compound 5c and 5d exhibited an interesting profile of activity and selectivity for various cell lines. The mean graph mid point of log-io TGI and log 1Q LC50 showed similar pattern to the log-to GI50 mean graph mid points.
- each cancer type represents the average of six to eight different cancer cell lines.
- In vitro evaluation of cytotoxic activity Among them 5a exhibits a wide spectrum of activity against sixty cell lines in nine cell panels, with GI 50 value of ⁇ 20 nM.
- the growth of HOP-62, NCI-H23 cell lines were affected by compound 5a with GI 50 values as 11.4, 14.6 and 19.7 nM respectively.
- the GI 50 values of compound 5a against colon cancer HCC-2988, HCT-116 and KM12 cell lines are 11.3, 11.8 and 11.7 nM respectively.
- the Gl 50 values for compound 5a against CNS SF-295, SF-539, SNB-19 and SNB-75 cell lines are in a range of 12.6-23.9 nM.
- Four cancer cell lines (OVCAR-4, OVCAR-5, OVCAR-8 and SK-OV-3) in the ovarian cancer cell panel were affected by compound 5a with Gl 50 values of 31.6, 15.1 , 30.5 and 79.8 nM respectively.
- compound 5c exhibited cytotoxicity activity against renal and breast cancer panels with Gl 50 values (11.6-43.4 nM).
- Compound 5c exhibits activity against sixty cell lines in nine cancer cell panels with GI 50 values of ⁇ 10 ⁇ M.
- Compound 5d exhibits activity against fifty-seven cell lines in nine cancer cell panels, GI 50 values of ⁇ 10 ⁇ M. Cytotoxicity of compounds 5a, 5c and 5d in selected cancer cell lines has been illustrated in and 5d have been, illustrated in Table 1, 2 and 3.Table 2. The average GI 50 values for each cancer panel of compounds 5a, 5c, and 5d have been illustrated in Table 1, 2 and 3.
- the mean graph mid point values of logTM TGl and log 10 LC 50 as well as logTM GI 5 0 for 5a, 5c and 5d are listed in Table-3. As demonstrated by mean graph pattern, compounds 5a, 5c and 5d exhibit an interesting profile of activity and selectivity for various cell lines.
- the mean graph mid points of logTM TGI and logTM LC 50 have shown similar pattern to the logTM Gl 50 mean graph mid points.
- logTM Gl 50 , logTM TGI and logTM LC 50 mean graphs midpoints (MG_MID) of In vitro cytotoxicity data for the compounds 5a, 5c and 5d against human tumor cell lines.
- ADR Adiramycin is the control drug
- CT-DNA duplex-form calf thymus DNA
- Working solutions in aqueous buffer (10 mM NaH 2 PO 4 ZNa 2 HPO 4 , 1 mM Na 2 EDTA, pH 7.00+0.01) containing CT-DNA (100 ⁇ m in phosphate) and the PBD (20 ⁇ m) were prepared by addition of concentrated PBD solutions in DMSO to obtain a fixed [PBD]/[DNA] molar ratio of 1 :5.
- the DNA-PBD solutions were incubated at 37 0 C for 0, 18, and 36 h prior to analysis.
- the present invention provides a new pyrrolo[2,1-c][1 ,4]benzodiazepine hybrids useful as antitumour agents.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN518DE2008 | 2008-03-05 | ||
PCT/IN2008/000712 WO2009109984A1 (en) | 2008-03-05 | 2008-10-31 | Quinazoline linked pyrrolo[2,1-c][1, 4]benzodiazepine hybrids as potential anticancer agents and process for the preparation thereof' |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2265613A1 true EP2265613A1 (en) | 2010-12-29 |
EP2265613B1 EP2265613B1 (en) | 2013-07-24 |
Family
ID=40344785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08873110.4A Not-in-force EP2265613B1 (en) | 2008-03-05 | 2008-10-31 | Quinazoline linked pyrrolo[2,1-c][1, 4]benzodiazepine hybrids as potential anticancer agents and process for the preparation thereof |
Country Status (4)
Country | Link |
---|---|
US (1) | US8153627B2 (en) |
EP (1) | EP2265613B1 (en) |
JP (1) | JP5657395B2 (en) |
WO (1) | WO2009109984A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6133431B2 (en) | 2012-11-24 | 2017-05-24 | ハンジョウ ディーエーシー バイオテック シーオー.,エルティディ.Hangzhou Dac Biotech Co.,Ltd. | Use of hydrophilic conjugates and conjugation reactions between drug molecules and cell binding molecules |
US10464955B2 (en) | 2014-02-28 | 2019-11-05 | Hangzhou Dac Biotech Co., Ltd. | Charged linkers and their uses for conjugation |
AU2015242213A1 (en) | 2015-07-12 | 2018-03-08 | Hangzhou Dac Biotech Co., Ltd | Bridge linkers for conjugation of cell-binding molecules |
US9839687B2 (en) | 2015-07-15 | 2017-12-12 | Suzhou M-Conj Biotech Co., Ltd. | Acetylenedicarboxyl linkers and their uses in specific conjugation of a cell-binding molecule |
KR20220147720A (en) | 2016-11-14 | 2022-11-03 | 항저우 디에이씨 바이오테크 씨오, 엘티디 | Conjugation linkers, cell binding molecule-drug conjugates containing the likers, methods of making and uses such conjugates with the linkers |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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AU2003222444A1 (en) * | 2003-03-31 | 2004-10-25 | Council Of Scientific And Industrial Research | NEW PYRIMIDINE LINKED PYRROLO(2,1-c)(1,4)BENZODIAZEPINES AS POTENTIAL ANTITUMOUR AGENTS |
EP1608663B1 (en) * | 2003-03-31 | 2008-11-05 | Council of Scientific and Industrial Research | Pyrrolo (2,1-c)(1,4) benzodiazepines dimers as antitumour agents and process thereof |
WO2006003670A1 (en) | 2004-06-30 | 2006-01-12 | Council Of Scientific And Industrial Research | Pyrrolo[2,1-c][1,4]benzodiazepine-napthalimide conjugates linked through piperazine moiety and process for preparation thereof |
WO2007054954A1 (en) * | 2005-11-10 | 2007-05-18 | Council Of Scientific & Industrial Research | A novel pyrrolo[2,1-c][1,4]benzodiazepine hybrid and a process for the preparation thereof |
WO2008020456A2 (en) * | 2006-08-14 | 2008-02-21 | Council Of Scientific & Industrial Research | Pyrrolo[2,1-c][1,4]benzodiazepine hybrids and a process for the preparation thereof |
-
2008
- 2008-10-31 US US12/920,654 patent/US8153627B2/en not_active Expired - Fee Related
- 2008-10-31 JP JP2010549255A patent/JP5657395B2/en not_active Expired - Fee Related
- 2008-10-31 WO PCT/IN2008/000712 patent/WO2009109984A1/en active Application Filing
- 2008-10-31 EP EP08873110.4A patent/EP2265613B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
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See references of WO2009109984A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2009109984A1 (en) | 2009-09-11 |
US8153627B2 (en) | 2012-04-10 |
JP5657395B2 (en) | 2015-01-21 |
JP2011513389A (en) | 2011-04-28 |
EP2265613B1 (en) | 2013-07-24 |
US20110046111A1 (en) | 2011-02-24 |
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